drivers/net/hydra.c

   1 /* New Hydra driver using generic 8390 core */
   2 /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
   3
   4 /* This file is subject to the terms and conditions of the GNU General      */
   5 /* Public License.  See the file COPYING in the main directory of the       */
   6 /* Linux distribution for more details.                                     */
   7
   8 /* Peter De Schrijver (p2@mind.be) */
   9 /* Oldenburg 2000 */
  10
  11 /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a    */
  12 /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM  */
  13 /* and 10BASE-2 (thin coax) and AUI connectors.                             */
  14
  15 #include <linux/module.h>
  16 #include <linux/kernel.h>
  17 #include <linux/string.h>
  18 #include <linux/errno.h>
  19 #include <linux/ioport.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/init.h>
  25 #include <linux/bitops.h>
  26
  27 #include <asm/io.h>
  28 #include <asm/irq.h>
  29 #include <asm/amigaints.h>
  30 #include <asm/amigahw.h>
  31 #include <linux/zorro.h>
  32
  33 #define EI_SHIFT(x)     (ei_local->reg_offset[x])
  34 #define ei_inb(port)   in_8(port)
  35 #define ei_outb(val,port)  out_8(port,val)
  36 #define ei_inb_p(port)   in_8(port)
  37 #define ei_outb_p(val,port)  out_8(port,val)
  38
  39 static const char version[] =
  40     "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
  41
  42 #include "lib8390.c"
  43
  44 #define NE_EN0_DCFG     (0x0e*2)
  45
  46 #define NESM_START_PG   0x0    /* First page of TX buffer */
  47 #define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */
  48
  49 #define HYDRA_NIC_BASE 0xffe1
  50 #define HYDRA_ADDRPROM 0xffc0
  51 #define HYDRA_VERSION "v3.0alpha"
  52
  53 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
  54
  55
  56 static int __devinit hydra_init_one(struct zorro_dev *z,
  57                                     const struct zorro_device_id *ent);
  58 static int __devinit hydra_init(struct zorro_dev *z);
  59 static int hydra_open(struct net_device *dev);
  60 static int hydra_close(struct net_device *dev);
  61 static void hydra_reset_8390(struct net_device *dev);
  62 static void hydra_get_8390_hdr(struct net_device *dev,
  63                                struct e8390_pkt_hdr *hdr, int ring_page);
  64 static void hydra_block_input(struct net_device *dev, int count,
  65                               struct sk_buff *skb, int ring_offset);
  66 static void hydra_block_output(struct net_device *dev, int count,
  67                                const unsigned char *buf, int start_page);
  68 static void __devexit hydra_remove_one(struct zorro_dev *z);
  69
  70 static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
  71     { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
  72     { 0 }
  73 };
  74 MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl);
  75
  76 static struct zorro_driver hydra_driver = {
  77     .name       = "hydra",
  78     .id_table   = hydra_zorro_tbl,
  79     .probe      = hydra_init_one,
  80     .remove     = __devexit_p(hydra_remove_one),
  81 };
  82
  83 static int __devinit hydra_init_one(struct zorro_dev *z,
  84                                     const struct zorro_device_id *ent)
  85 {
  86     int err;
  87
  88     if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
  89         return -EBUSY;
  90     if ((err = hydra_init(z))) {
  91         release_mem_region(z->resource.start, 0x10000);
  92         return -EBUSY;
  93     }
  94     return 0;
  95 }
  96
  97 static const struct net_device_ops hydra_netdev_ops = {
  98         .ndo_open               = hydra_open,
  99         .ndo_stop               = hydra_close,
 100
 101         .ndo_start_xmit         = __ei_start_xmit,
 102         .ndo_tx_timeout         = __ei_tx_timeout,
 103         .ndo_get_stats          = __ei_get_stats,
 104         .ndo_set_multicast_list = __ei_set_multicast_list,
 105         .ndo_validate_addr      = eth_validate_addr,
 106         .ndo_set_mac_address    = eth_mac_addr,
 107         .ndo_change_mtu         = eth_change_mtu,
 108 #ifdef CONFIG_NET_POLL_CONTROLLER
 109         .ndo_poll_controller    = __ei_poll,
 110 #endif
 111 };
 112
 113 static int __devinit hydra_init(struct zorro_dev *z)
 114 {
 115     struct net_device *dev;
 116     unsigned long board = ZTWO_VADDR(z->resource.start);
 117     unsigned long ioaddr = board+HYDRA_NIC_BASE;
 118     const char name[] = "NE2000";
 119     int start_page, stop_page;
 120     int j;
 121     int err;
 122
 123     static u32 hydra_offsets[16] = {
 124         0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
 125         0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
 126     };
 127
 128     dev = ____alloc_ei_netdev(0);
 129     if (!dev)
 130         return -ENOMEM;
 131
 132     for(j = 0; j < ETHER_ADDR_LEN; j++)
 133         dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
 134
 135     /* We must set the 8390 for word mode. */
 136     z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
 137     start_page = NESM_START_PG;
 138     stop_page = NESM_STOP_PG;
 139
 140     dev->base_addr = ioaddr;
 141     dev->irq = IRQ_AMIGA_PORTS;
 142
 143     /* Install the Interrupt handler */
 144     if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
 145                     dev)) {
 146         free_netdev(dev);
 147         return -EAGAIN;
 148     }
 149
 150     ei_status.name = name;
 151     ei_status.tx_start_page = start_page;
 152     ei_status.stop_page = stop_page;
 153     ei_status.word16 = 1;
 154     ei_status.bigendian = 1;
 155
 156     ei_status.rx_start_page = start_page + TX_PAGES;
 157
 158     ei_status.reset_8390 = hydra_reset_8390;
 159     ei_status.block_input = hydra_block_input;
 160     ei_status.block_output = hydra_block_output;
 161     ei_status.get_8390_hdr = hydra_get_8390_hdr;
 162     ei_status.reg_offset = hydra_offsets;
 163
 164     dev->netdev_ops = &hydra_netdev_ops;
 165     __NS8390_init(dev, 0);
 166
 167     err = register_netdev(dev);
 168     if (err) {
 169         free_irq(IRQ_AMIGA_PORTS, dev);
 170         free_netdev(dev);
 171         return err;
 172     }
 173
 174     zorro_set_drvdata(z, dev);
 175
 176     pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n",
 177             dev->name, &z->resource, dev->dev_addr);
 178
 179     return 0;
 180 }
 181
 182 static int hydra_open(struct net_device *dev)
 183 {
 184     __ei_open(dev);
 185     return 0;
 186 }
 187
 188 static int hydra_close(struct net_device *dev)
 189 {
 190     if (ei_debug > 1)
 191         printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
 192     __ei_close(dev);
 193     return 0;
 194 }
 195
 196 static void hydra_reset_8390(struct net_device *dev)
 197 {
 198     printk(KERN_INFO "Hydra hw reset not there\n");
 199 }
 200
 201 static void hydra_get_8390_hdr(struct net_device *dev,
 202                                struct e8390_pkt_hdr *hdr, int ring_page)
 203 {
 204     int nic_base = dev->base_addr;
 205     short *ptrs;
 206     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
 207                              ((ring_page - NESM_START_PG)<<8);
 208     ptrs = (short *)hdr;
 209
 210     *(ptrs++) = z_readw(hdr_start);
 211     *((short *)hdr) = WORDSWAP(*((short *)hdr));
 212     hdr_start += 2;
 213     *(ptrs++) = z_readw(hdr_start);
 214     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
 215 }
 216
 217 static void hydra_block_input(struct net_device *dev, int count,
 218                               struct sk_buff *skb, int ring_offset)
 219 {
 220     unsigned long nic_base = dev->base_addr;
 221     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 222     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
 223
 224     if (count&1)
 225         count++;
 226
 227     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
 228         int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
 229
 230         z_memcpy_fromio(skb->data,xfer_start,semi_count);
 231         count -= semi_count;
 232         z_memcpy_fromio(skb->data+semi_count, mem_base, count);
 233     } else
 234         z_memcpy_fromio(skb->data, xfer_start,count);
 235
 236 }
 237
 238 static void hydra_block_output(struct net_device *dev, int count,
 239                                const unsigned char *buf, int start_page)
 240 {
 241     unsigned long nic_base = dev->base_addr;
 242     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
 243
 244     if (count&1)
 245         count++;
 246
 247     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
 248 }
 249
 250 static void __devexit hydra_remove_one(struct zorro_dev *z)
 251 {
 252     struct net_device *dev = zorro_get_drvdata(z);
 253
 254     unregister_netdev(dev);
 255     free_irq(IRQ_AMIGA_PORTS, dev);
 256     release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
 257     free_netdev(dev);
 258 }
 259
 260 static int __init hydra_init_module(void)
 261 {
 262     return zorro_register_driver(&hydra_driver);
 263 }
 264
 265 static void __exit hydra_cleanup_module(void)
 266 {
 267     zorro_unregister_driver(&hydra_driver);
 268 }
 269
 270 module_init(hydra_init_module);
 271 module_exit(hydra_cleanup_module);
 272
 273 MODULE_LICENSE("GPL");